.detail{
  position: fixed;
  height: 100%;
  background-color: #fff;
  top: 0;
  max-width: 600px;
  width: 100%;
  z-index: 12;
  .head_back{
    z-index: 2;
  }
  .detail_img_wrap{
    -webkit-overflow-scrolling: touch;
    overflow: auto;
    padding-top: 40px;
    height: 100%;
    >div{
      font-size: 0;
    }
  }
}